Tool-feeding mechanism



Dec, 16, 1924.

E. 'Hf WRAY TOOL FEEDING MEGHANISM Filed Sept; 16

of gears 31, 32 and 38 keyed to shaft 21. A key 34 is provided in the shaft 20 between gears 29 and 30 and the shaft is longitudinally slidable to enga-ge the key with either gear. A spring pressed detent 35 is adapted to enter either notch 36 or 37 in the shaft to hold the key engaged with either gear.

As illustrated in Fig. 2, gears 32 and 33 on the shaft 21 are in mesh with gears 38 and 39 loose on shaft 22. Shaft 22 is provided with a key 40 and is slidable to engage the key with either gear 38 or 39, a spring pressed detent also being provided for engaging within either notch L11 or l2 to hold the key in its driving engagement with either gear.

A gear 43 splined to shaft 22 is in mesh with a gear 44. loose on screw 13. A clutch element 45 is splined to the screw adjacent the gear 14 and is adapted to be shifted into engagement with such gear for driving the screw. By disengaging this clutch, the screw may be rotated by hand through a handle 46 thereon without rotating the several gears between the screw and ring gear.

In opera-tion it will be noted that the worm 2/1 and worm wheel 25, in connection with the change speed gears, provides reduction gearing for feeding the tool at the proper reduced speed relative to the spindle rotation and by shifting the shafts 2O and 22 longitudinally, four different feeding speeds may be given to the tool. Should it be desired to rotate the spindle without feeding the tool, the screw 28 may be rotated to draw the bevel gear 26 from engagement with the ring gear whereupon shaft 19 and the feeding mechanism in connection therewith remainV idle.

It s hould be understood that the hori- Zontal boring machine shown in Fig. 1 of the drawing is adapted to perform boring operations (the boring bar not being illustrated), facing operations by the tool 12 illustrated, or a combination of such operations simultaneously. It will be noted by reference to the drawing that the spindle 5 is tubular in form whereby an axial bore is provided therein for receiving the boring bar. In order to leave the spindle bore clear for receiving the boring bar, the guideway 11 for the tool holder 10 is formed at one side of such bore on the face plate 9. Oneend of the tool holder is elevated sufficiently to bring the tool on a diametrical line parallel with the guideway whereby the tool will be fed radially of the spindle as the tool holder is moved along the guideway. It should furthermore be noted that the guideway is formed on a surface of the support 18 facing toward the axis of the spindle 5. The tool holder is thereby rigidly supported on a broad guiding surface directly beneath the tool, such surfaces directly receiving the thrust of the tool in operation.

What I claim is:

1. A tool feeding mechanism comprising the combination of a headstock, a rotary spindle therein, a face plate on the spindle, a tool holder adapted to support a tool thereon for feeding movement substantially radially of the face plate, a ring gear surrounding the spindle and bolted to the headstock adjacent the face plate, an operative connection between the ring gear and the tool holder for automatically and continuously feeding the tool holder as the spindle rotates, and means comprising change speed gearing in the said operative connection and on the face plate for varying the feeding speed of the tool holder relative to the spindle rotation.

2. A tool feeding mechanism comprising the combination of a rotary spindle, a tool holder mounted on the spin-dle for rotary movement therewith, a rotary screw for moving the tool holder in a direction to move the tool therein substantially radially of the spindle, a ring gear surrounding the spindle, the spindle being adapted to rotate relative to the ring gear, and an operative connection comprising a plurality of parallel shafts parallel with the screw and change speed gearing on the shafts between the ring gear and the screw for continuously rotating the screw to feed the tool holder as the spindle rotates and for varying the feeding speed thereof relative to the spindle rotat-ion.

3. A tool feeding mechanism comprising the combination o-f a rotary spindle, a face plate thereon, a support projecting from the face of the face plate at one side of the spindle axis and having a guideway therein, a tool holder wholly supported for sliding movement in the guideway and adapted to support a tool thereon movable with the holder in a direction substantially radially of the spindle, a screw operatively connected to the tool holder, means for rotating the screw to automatically and continuously feed the tool holder along the guideway as the spindle rotates, and means whereby the feeding speed of the tool holder may be varied.

el. A tool feeding mechanism comprising the combination of a rotary spindle, a face plate thereon, a support projecting from the face of the face plate at one side of the spindle axis and having a. guideway therein. a

tool holder wholly supported for sliding 4 movement in the guideway and adapted to support a tool thereon movable with the holder in a direction substantially radially of the spindle, a screw operatively connected to the tool holder, and means including change speed gearing within the said support for rotating the screw to automatically and continuously feed the tool holder at different speeds along the guideway as the spindle rotates, l

5. tool feeding' mechanism comprising the combination of a rotary spindle7 a face plate thereon, a support projecting from the tace of the face.y plate at one side of the spindle and having a guideway thereon facing,l toward the spindle axis, atool holder slidable in the guideway and adapted to support a tool therein movable With the holder in a direction substantially radially of the spindle, a screnv operatively connected to the tool hol der, and means tor rotating the screw to automatically and continuously feed the tool holder along the guideivay as the spindle rotates.

(i. A tool feeding' mechanism Comprising the combination of a rotary spindle, a face plate on the spindle, the spindle and tace plate having an axial bore therein for receiving a boring' bar and the tace plate being provided with a ,guidewayg a tool holder islidahle in the guiden'ay and adapted to support a tool thereon movable With the holder in a direction substantially radial of the spindle, a screuY operatively connected to the tool holder, and means for rotating the screw to automatically and continuously feed the tool holder along' the guideway as the spindle rotates, the screw being so positioned on the tace plate as to not interfere with the passage oit a boring bar through the said spindle and tace plate bore.

'1'. It tool feeding mechanism comprising` the combination of a rotary spindle, a face plate on the spindle. the spindle and tace plate haring` an axial here therein for receiving a boring' bar and the face plate being provided with a non-radial k 3uideway, a tool holder slidable in the guideway at one side of the spindle anis and adapted to support a tool thereon movable with the holder in a di rection substantially radially of the spindle, and means operatively connected to the tool holder for automatically and continuously 'feeding the tool holder along the guideway as the spindle rotates.

8. A tool feeding mechanism comprising the combination of a rotary spindle, a tace plate on the spindle, the spindle and face pla-te having; an axial bore therein for receiving' a boring bar and the face plate being provided with a non-ra dial guideway, a tool holder slidable in the guideuay and adapted to support a tool thereon movable with the holder in a direction substantially radially ot the spindle, a screw operatively connected to the tool holder, and means including change speed mechanism for rotating the screw to automatically and continuously Jreed the tool holder at different speeds along the guideivay as the spindle rotates.

9. A tool feedingn mechanism comprising the combination oit' a rotary spindle, a face plate on the spindle, the spindle and face plate having` an axial bore therein 'for receiving ay boring; bar, a` support projecting from the tace oi' the tace plate atene side ot the spindle and having a gliideway therein, a tool holder slidable in the guideway and adapted to support a tool thereon movable with the holder in a direction substantially radially ot the spindle, a screw operatively connected to the tool holder, and means including change speed gearing Within the said support for rotating the screw to automatically and continuously feed the tool holder at dili'erent speeds along' the guideWa-y as the spindle rotates.

ln testimony whereof, l hereto aliix my signature.

EDWARD H. VRAY. 

